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Program to find simple interest

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  • Last Updated : 21 Jun, 2022

What is ‘Simple Interest’? 
Simple interest is a quick method of calculating the interest charge on a loan. Simple interest is determined by multiplying the daily interest rate by the principal by the number of days that elapse between payments. 
Simple Interest formula:
 

Simple interest formula is given by: 
Simple Interest = (P x T x R)/100 
Where, 
P is the principle amount 
T is the time and 
R is the rate

Examples : 
 

EXAMPLE1:
Input : P = 10000
        R = 5
        T = 5
Output :2500
We need to find simple interest on 
Rs. 10,000 at the rate of 5% for 5 
units of time.

EXAMPLE2:
Input : P = 3000
        R = 7
        T = 1
Output :210

 

The formula to calculate the simple interest is: simple_interest = (P * T * R) / 100 where P is the principal amount, T is time & R is the rate of interest. 
 

C++




// CPP program to find simple interest for
// given principal amount, time and rate of
// interest.
#include<iostream>
using namespace std;
int main()
{
    // We can change values here for
    // different inputs
    float P = 1, R = 1, T = 1;
 
    /* Calculate simple interest */
    float SI = (P * T * R) / 100;
 
    /* Print the resultant value of SI */
    cout << "Simple Interest = " << SI;
 
    return 0;
}

C




#include <stdio.h>
 
int main()
{
    // We can change values here for
    // different inputs
    float P = 1, R = 1, T = 1;
 
    /* Calculate simple interest */
    float SI = (P * T * R) / 100;
 
    printf("Simple Interest = %f\n", SI);
 
    return 0;
}
 
// This code is contributed by agarwalsajal19.

Java




// A Simple JAVA program to compute
// simple interest for given principal
// amount, time and rate of interest.
import java.io.*;
 
class GFG
{
    public static void main(String args[])
    {  
        // We can change values here for
        // different inputs
        float P = 1, R = 1, T = 1;
         
        /* Calculate simple interest */
        float SI = (P * T * R) / 100;
        System.out.println("Simple interest = "+ SI);
    }
}
 
// This code is contributed by Anant Agarwal.

Python3




# Python3 program to find simple interest
# for given principal amount, time and
# rate of interest.
 
# We can change values here for
# different inputs
P = 1
R = 1
T = 1
 
# Calculates simple interest
SI = (P * R * T) / 100
 
# Print the resultant value of SI
print("simple interest is", SI)
  
# This code is contributed by Azkia Anam.

C#




// A Simple C# program to compute
// simple interest for given principal
// amount, time and rate of interest.
using System;
 
class GFG {
     
    // Driver Code
    public static void Main()
    {
         
        // We can change values here for
        // different inputs
        float P = 1, R = 1, T = 1;
         
        // Calculate simple interest
        float SI = (P * T * R) / 100;
        Console.Write("Simple interest = "+ SI);
    }
}
 
// This code is contributed by Nitin Mittal.

PHP




<?php
// PHP program to find simple interest
// for given principal amount, time
// and rate of interest.
 
// We can change values here for
// different inputs
$P = 1;
$R = 1;
$T = 1;
 
/* Calculate simple interest */
$SI = ($P * $T * $R) / 100;
 
/* Print the resultant value of SI */
echo "Simple Interest = ". $SI;
 
// This code is contributed by Sam007
?>

Javascript




<script>
 
// JavaScript program to find simple interest for
// given principal amount, time and rate of
// interest.
 
 
    // We can change values here for
    // different inputs
    let P = 1, R = 1, T = 1;
 
    /* Calculate simple interest */
    let SI = (P * T * R) / 100;
 
    /* Print the resultant value of SI */
    document.write("Simple Interest = " + SI);
 
 
// This code is contributed by Surbhi Tyagi.
 
</script>

Output : 

Simple Interest : 0.01

Time complexity : O(1) 
Auxiliary Space : O(1)

This article is contributed by Anurag Rawat. If you like GeeksforGeeks and would like to contribute, you can also write an article using write.geeksforgeeks.org or mail your article to review-team@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.
Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above.
 


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